[SPEC] Design generalized job type registration & abstractions

[shekohex]

Internal Draft: https://www.notion.so/webbtools/SPEC-Generalized-job-type-registration-abstractions-07e4fd0c79204972ba652c574c2c821f

Checklist

• [x] Introduce the new JobDefinition and JobCall structure. [EO Apr 17]
• [x] Create JobResultVerifier for EVM [EO Apr 18]
• [x] Introduce Services that groups different Jobs together [EO Apr 19]

All these features should be added to jobs/v2 branch, not main. This branch should always be in sync with main branch until the whole feature is ready to be added to main. This will ensure no breaking changes to other team members.

[shekohex]

All types and structure have been designed and implemented from here: https://excalidraw.com/#json=PWCqhHsqJHBmOlKx5O3BR,0L7q6579lh3StJa2apT7Eg